todo-form.component.ts

user: User;

ngOnInit() {
   this.todoForm = this.formBuilder.group({
     title: ['', Validators.required],
     description: ['', Validators.required],
     done: false
   });

   if (!this.createMode) { this.loadTodo(this.todo); }

   this.afAuth.user.subscribe(user => {
      if (user){
        this.user = user;
      }
    })
}